Games like FISH
Games like FISH include Hollow Knight, Hollow Knight: Silksong, Skul: The Hero Slayer, Pizza Tower, and Nine Sols. We matched them by the tags players give FISH on Steam (Action, Platformer, Funny, Shoot 'Em Up, and 2D): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Platformer · 2D · Indie

Hollow Knight: Silksong
Shared: Indie · Platformer · 2D

Skul: The Hero Slayer
Shared: Action · Indie · 2D

Pizza Tower
Shared: Funny · Platformer · Indie

Nine Sols
Shared: Platformer · Action · 2D

Dust: An Elysian Tail
Shared: Action · Platformer · Indie

Broforce
Shared: Action · Platformer · 2D

Rogue Legacy
Shared: Platformer · Action · Indie

Getting Over It with Bennett Foddy
Shared: Funny · Singleplayer · Platformer

Duck Game
Shared: Funny · Action · Platformer

Jump King
Shared: Platformer · Indie · Action

Geometry Dash
Shared: 2D · Platformer · Singleplayer

Dungeon Munchies
Shared: Action · Indie · Funny

Portal 2
Shared: Platformer · Singleplayer · Funny

Shovel Knight: Treasure Trove
Shared: Platformer · Action · 2D

Cuphead
Shared: Platformer · 2D · Indie

Move or Die
Shared: Funny · Action · 2D

Ori and the Will of the Wisps
Shared: Platformer · Action · Singleplayer

BEEP
Shared: Platformer · Indie · 2D

My Friend Pedro
Shared: Action · Indie · Platformer

BattleBlock Theater®
Shared: Platformer · Funny · 2D

The Messenger
Shared: Platformer · Action · 2D

Blasphemous
Shared: 2D · Action · Indie

Super Meat Boy
Shared: Platformer · Indie · 2D